I doubt you will be able to remove the knock-offs with a rubber hammer. If you care about the knock-off themselves, use a lead hammer. Even a copper or bass hammer will mare the chrome. I speak from experience. If you don't care about the knock-offs, use any BFH you have around. Left (US driver's side) unscrew CCW. Opposite for the right side. Most knock-offs are marked with the undo direction.
I've already described how you can unstick frozen splines. If the car is driveable, you can try the driving in circles or eights method, but it doesn't sound driveable.
Lead hammers are available from Moss. I've bought them from British Wire Wheel and a local Brit car parts store that is supplied by Moss.
Roland